Refactor FaucetUntaggedPrometheusGaugeTest so easy to increase number of cycles.
Refactor FaucetUntaggedPrometheusGaugeTest so easy to increase number of cycles.

anarkiwi/faucet,shivarammysore/faucet,Bairdo/faucet,trungdtbk/faucet,gizmoguy/faucet,byllyfish/faucet,byllyfish/faucet,trentindav/faucet,faucetsdn/faucet,REANNZ/faucet,gizmoguy/faucet,faucetsdn/faucet,Bairdo/faucet,trentindav/faucet,wackerly/faucet,REANNZ/faucet,shivarammysore/faucet,wackerly/faucet,mwutzke/faucet,mwutzke/faucet,trungdtbk/faucet,anarkiwi/faucet